Sound not working

I'm running Fedora Core 4 on a Dell Diminsion 4600.
The sound used to work under Linux, but it no longer
does. The sound card, cables, etc., are OK, because
this is a dual-boot system, and the sound works OK
under Windoze. The sound card is integrated, and Linux
detects it:


aries:/tmp> lspci|grep -i aud
00:1f.5 Multimedia audio controller: Intel Corporation 82801EB/ER
(ICH5/ICH5R) AC'97 Audio Controller (rev 02)

It looks as though the necessary sound modules are loaded.
However, I did manually load the ALSA driver manually
using "modprobe snd-als4000":

aries:/tmp> lsmod|grep snd
snd_als4000 20129 0
snd_sb_common 24001 1 snd_als4000
gameport 21321 1 snd_als4000
snd_opl3_lib 14401 1 snd_als4000
snd_hwdep 9313 1 snd_opl3_lib
snd_mpu401_uart 12481 1 snd_als4000
snd_rawmidi 36321 1 snd_mpu401_uart
snd_intel8x0 37505 2
snd_ac97_codec 80829 1 snd_intel8x0
snd_seq_dummy 3781 0
snd_seq_oss 42945 0
snd_seq_midi_event 10177 1 snd_seq_oss
snd_seq 78033 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device 9165 5 snd_opl3_lib,snd_rawmidi,snd_seq_dummy,snd_seq_oss,snd_seq
snd_pcm_oss 53105 0
snd_mixer_oss 18241 2 snd_pcm_oss
snd_pcm 112201 4 snd_als4000,snd_intel8x0,snd_ac97_codec,snd_pcm_oss
snd_timer 42437 3 snd_opl3_lib,snd_seq,snd_pcm
snd 62021 17 snd_als4000,snd_sb_common,snd_opl3_lib,snd_hwdep,snd_mpu401_uart,snd_rawmidi,snd_intel8x0,snd_ac97_codec,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer
soundcore 12449 2 snd
snd_page_alloc 10825 2 snd_intel8x0,snd_pcm


When I try to run system-config-soundcard, it detects the
card, but I can't play a test sound:

aries:/tmp> /usr/bin/system-config-soundcard
amixer: Unable to find simple control 'PCM-2',0
amixer: Unable to find simple control 'DRC Range',0
Playing WAVE '/usr/share/system-config-soundcard/sound-sample.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo


Any ideas where to go from here?

-Thanks

.

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